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#pragma once
#include <Common/CurrentMetrics.h>
#include "clickhouse_config.h"
#include <Core/PostgreSQLProtocol.h>
#include <Poco/Net/TCPServerConnection.h>
#include "IServer.h"
#if USE_SSL
# include <Poco/Net/SecureStreamSocket.h>
#endif
namespace CurrentMetrics
{
extern const Metric PostgreSQLConnection;
}
namespace DB
{
class ReadBufferFromPocoSocket;
class Session;
class TCPServer;
/** PostgreSQL wire protocol implementation.
* For more info see https://www.postgresql.org/docs/current/protocol.html
*/
class PostgreSQLHandler : public Poco::Net::TCPServerConnection
{
public:
PostgreSQLHandler(
const Poco::Net::StreamSocket & socket_,
IServer & server_,
TCPServer & tcp_server_,
bool ssl_enabled_,
Int32 connection_id_,
std::vector<std::shared_ptr<PostgreSQLProtocol::PGAuthentication::AuthenticationMethod>> & auth_methods_);
void run() final;
private:
Poco::Logger * log = &Poco::Logger::get("PostgreSQLHandler");
IServer & server;
TCPServer & tcp_server;
std::unique_ptr<Session> session;
bool ssl_enabled = false;
Int32 connection_id = 0;
Int32 secret_key = 0;
std::shared_ptr<ReadBufferFromPocoSocket> in;
std::shared_ptr<WriteBuffer> out;
std::shared_ptr<PostgreSQLProtocol::Messaging::MessageTransport> message_transport;
#if USE_SSL
std::shared_ptr<Poco::Net::SecureStreamSocket> ss;
#endif
PostgreSQLProtocol::PGAuthentication::AuthenticationManager authentication_manager;
CurrentMetrics::Increment metric_increment{CurrentMetrics::PostgreSQLConnection};
void changeIO(Poco::Net::StreamSocket & socket);
bool startup();
void establishSecureConnection(Int32 & payload_size, Int32 & info);
void makeSecureConnectionSSL();
void sendParameterStatusData(PostgreSQLProtocol::Messaging::StartupMessage & start_up_message);
void cancelRequest();
std::unique_ptr<PostgreSQLProtocol::Messaging::StartupMessage> receiveStartupMessage(int payload_size);
void processQuery();
static bool isEmptyQuery(const String & query);
};
}
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